Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Clear

88°F

31°C

Humidity 29%
Wind Speed W 8 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 20 Mar 04:00 PM PDT
Extended Forecast for

2 Miles NE Union City CA

Heat Advisory March 20, 04:25pm until March 20, 08:00pm
Click here for hazard details and duration
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  •  
    Heat Advisory March 20, 04:25pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 74. Light northwest wind becoming west 5 to 10 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 50. West southwest wind 5 to 9 mph.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Southwest wind 5 to 9 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 57. West northwest wind 5 to 7 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 74. Light northwest wind becoming west 5 to 10 mph in the morning.
Saturday Night
Mostly clear, with a low around 50. West southwest wind 5 to 9 mph.
Sunday
Sunny, with a high near 74. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50. Southwest wind 5 to 9 mph.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 75.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NE Union City CA
 37.61°N 122°W (Elev. 594 ft)
2:07 pm PDT Mar 20, 2026
4pm PDT Mar 20, 2026-6pm PDT Mar 27, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database